--- image_gallery.tpl.php	2007-07-02 11:48:03.000000000 -0400
+++ image_gallery.tpl.php2	2007-07-03 09:02:02.000000000 -0400
@@ -1,5 +1,5 @@
 <?php
-$size = _image_get_dimensions('thumbnail');
+$size = _image_get_sizes('thumbnail');
   $width = $size['width'];
   $height = $size['height'];